Improvement in machines for bending edges of sheet metal



.UNITE STATES PATENT Trice.

F. BOYS, OF EAST BERLIN, CONNECTICUT.

IMPROVEMENT IN MACHINES FOR BENDING EDGESOF SHEET METAL.

Specification forming part of Letters Patent No. 412,967., dated May 3l, 1864.

To @ZZ whom it may concern:

Beit known that I, F. BOYS, of East Berlin, in the county of Hartford and State of Connecticut, have invented a new and Improved Machine for Bending Edges of Sheet-Metal Roofing-Plates Preparatory to Forming the Locks or Joints thereof, and I do hereby declare that the following is a full, clear, and exact description 'of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a front sectional view of my invention, taken in the line x x, Fig. 2; Fig. 2, a plan or top view of the same; Figs. 3 and 4, detached front views ofthe metal plates which bend the edges of the metal sheets, Fig. 5, an end view of a roofing-plate bent by my invention.-

Similar letters of reference indicate correspending parts inthe several figures.

This invention relates to a new and useful machine for bending the edges of sheet-metal roong-plates when applied to the roof, said machine being designed for` preparing the plates to form locks or joints by which they are connected together.

The invention consists in the employment or use of guides and folding or bending plates attached to a frame mounted on wheels, and all arranged as hereinafter fully set forth.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a frame or platform composed of two plates, a c, which are secured to trans- Verse bars B B, the latter being composed each of two parts, b b, connected by a short bar, c. These short bars c are attached to the two parts b b of the bars B by screws d, one of which of each bar passes through an oblong slot to admit of the frame or platform A being increased or diminished in width, as may be -required. The frame or platform A is mounted on wheels C, which are on the outer ends of the bars B, and to the front end of `,each plate a of the frame or platform A there is secured an inclined bar, D. These bars eX- tend down by the sides of the front wheels, C C, and each of them has a plate, E, projecting laterally from it and toward the wheel C. (See more particularly Figs. 2 and 3.) The inclined bars D D perform two functions, to wit: They support the plates E E, which project from the lower parts or under sides of the bars, and they also serve as guides or gages, as the lower parts, ax, of the bars above the surfaces of the plates E are in a horizontal position, and the plates c a are so adjusted that the edges of the sheet-metal plates will just touch the inner sides of the lower horizontal parts, ax, of the bars D D.

To each outer side of each plate c of the v frame or platform A, and between the wheels C, there are attached pendent rods F F, two of each. The rods F F are in line with each other longitudinally with the machine, and to said rods there is attached an angle-plate, G, the lower part, f, of which has a horizontal position, and the other part, f', avertical position, as shown clearly in Fig. 1.

To the rods F there is attached a curved plate, H. The front ends of these plates H have a horizontal position, and they have a gradual twist from their front to their back ends, so that Ithe back ends will be in a vertical position and parallel with the Vertical parts f of the angle-plates G, and be quite close to them. (See more particularly Fig. 2.)

The operation is as follows: The metal plates are laid upon the roof, s ide by side, lengthwise with the pitchof the roof, and the plates c c of the frame or platform A are so adjusted that the edges of the plates will be in contact with the inner surfaces of the lower horizontal parts, cx, of the bars D D. 'Ihe machine is then moved along, the operator sitting upon it. The plates E E, at the front ends of the bars D, work under the edges of the roofing-plates, (shown in red,) and slightly raise them from the roof, the lower parts, f, of the angle-plates Cr, and the front wheels, C, holding the main portions of' the plates down in proper position on the roof. The edges of the roofing-plates raised by the plates E pass between the vertical parts f of the angleplates G and the curved plates II, which cause the edges of the roofing-plates to be bent upward in a vertical position, as shown at g in Fig. 5. The vertical part f/ at one edge of the roofing-plate is a triie higher than the one g at the opposite edge, as will be seen by referring to Fig. 5, and the highest bent part, g, at the edge of one plate is by the side of the lower bent part, g', of the plate. By this simple device the edges of roofing-plates may be very expeditiously bent while laid upon the roof and prepared for being jointed or locked l plates E, when used in connection with the together. y plates Gr H, for the purpose specified.

Having thus described my invention, what I 3. rlhe adjustable frame or platform A, comelaim as new, and desire to secure by Letters posed of two parts, a a, attached to bars B B, Patent, is`-. which are connected together by bars o, all

l. The raising or lifting plates E, in eonneearranged, as shown, for the purpose of admittion with the angle-plates G and twisted or y ting the plates E G I-I being adjusted to suit curved plates H, all bei-ng attached to a mountthe Width 4of the rooting-plates, as set forth.

ed frame, and arranged to operate in the man- F. BOYS. ner substantially as and for the purpose here- Witnesses: in set forth. MARoELLUs CLARK,

2. The guides or gages (LX, adjoining the HENRY NASH. 

